Plot details under wraps.
Unfortunately the movie Downton Abbey: The Grand Finale is not yet available on HBO Max.
| Directing | Simon Curtis | Director |
| Writing | Julian Fellowes | Writer |
| Production | Julian Fellowes | Producer |
| Production | Gareth Neame | Producer |
| Production | Liz Trubridge | Producer |
| Production | Nigel Marchant | Producer |
| Art | Donal Woods | Production Design |
| Costume & Make-Up | Anna Mary Scott Robbins | Costume Design |
| Production | Peregrine Kitchener-Fellowes | Associate Producer |
| Editing | Adam Recht | Editor |
| Camera | Ben Smithard | Director of Photography |
| Art | Naomi Bailey | Art Direction |
| Art | Philippa Mumford | Art Direction |
| Art | Linda Wilson | Set Decoration |
| Production | Mark Hubbard | Co-Producer |
| Sound | John Lunn | Original Music Composer |
| Production | Jill Trevellick | Casting Director |
| Costume & Make-Up | Laura Blount | Makeup Supervisor |
| Costume & Make-Up | Krystal Buckley | Makeup Artist |
| Costume & Make-Up | Grace Firmin | Makeup Trainee |
| Costume & Make-Up | Samuel James | Wigmaker |
| Costume & Make-Up | Kirstie Lavin | Makeup Artist |
| Costume & Make-Up | Julia Plant | Makeup Artist |
| Costume & Make-Up | Sarah Spears | Makeup Artist |
| Costume & Make-Up | Sarah Webster | Makeup Trainee |
| Production | Aneta Chalas | Unit Production Manager |
| Production | Louis Phillips | Executive In Charge Of Production |
| Production | Tiffany Tiesiera | Executive In Charge Of Production |
| Directing | Jamie D. Allen | Second Assistant Director |
| Directing | Glen Carroll | Third Assistant Director |
| Production | Viki Carter | Production Assistant |
| Production | Emily Eyre | Production Assistant |
| Directing | Pippa Feldberg Collins | Third Assistant Director |
| Directing | Adam Lock | First Assistant Director |
| Directing | Liam Thornton | Third Assistant Director |
| Crew | Marc Bee | Carpenter |
| Art | Toby Bilton | Props |
| Art | Paul Bowring | Construction Manager |
| Art | Dominic Byles | Standby Property Master |
| Art | John Condron | Dressing Prop |
| Art | Francis Dixon | Assistant Art Director |
| Art | Amy Cooper Goodrich | Assistant Set Decoration |
| Art | Catherine Oswald | Standby Art Director |
| Art | Brett Ridge | Props |
| Art | Paul Whale | Dressing Prop |
| Sound | Jamie Allen | Sound Effects Editor |
| Sound | Jodie Campbell | Boom Operator |
| Sound | Emma Chilton | Sound Assistant |
| Sound | Michael Fearon | Sound Assistant |
| Sound | Nigel Heath | Sound Re-Recording Mixer |
| Sound | Nigel Heath | Supervising Sound Editor |
| Sound | David Lascelles | Production Sound Mixer |
| Sound | Andrew Mawson | Sound Assistant |
| Sound | Chris Whiteside | ADR Mixer |
| Visual Effects | Mike Crowley | Special Effects Supervisor |
| Crew | David Vialls | Special Effects Technician |
| Crew | Mark Weatherbe | Special Effects Technician |
| Visual Effects | Chris Reynolds | Special Effects Supervisor |
| Visual Effects | Sibel Allen | Visual Effects Coordinator |
| Visual Effects | Barnaby Brown | Digital Compositor |
| Visual Effects | Galina Yakovleva | Digital Compositor |
| Visual Effects | Fran Saa | Visual Effects |
| Visual Effects | Josh Sapsford | Visual Effects |
| Camera | Phil Arntz | Aerial Director of Photography |
| Camera | Luke Bannister | Drone Pilot |
| Camera | Jamie Brittain | Grip |
| Lighting | Dean Chambers | Electrician |
| Camera | Stephanie Chao | Camera Trainee |
| Camera | Mathew Clements | Second Assistant "A" Camera |
| Camera | Matthew J. Hicks | Digital Imaging Technician |
| Crew | Erin Hobbs | Video Assist Operator |
| Camera | Katie Jenkins | Camera Trainee |
| Lighting | Mike King | Rigging Supervisor |
| Production | Dom Lloyd | Data Management Technician |
| Production | Jess Pezet | Data Management Technician |
| Camera | Tomas Posada | Digital Imaging Technician |
| Lighting | Justin Range | Lighting Technician |
| Camera | Will Roth | Aerial Camera |
| Camera | Alfie Sankey-Green | Grip |
| Camera | Ashley P. Saunders | Camera Trainee |
| Camera | Josh Shutler | Camera Trainee |
| Camera | Paul Snell | First Assistant Camera |
| Camera | Chris Speddings | Digital Imaging Technician |
| Camera | Isabella Thompson | Digital Imaging Technician |
| Camera | Josh Tilley | Second Assistant "B" Camera |
| Lighting | David Tyler | Gaffer |
| Costume & Make-Up | Nina Barnes | Seamstress |
| Costume & Make-Up | Carly Andrews | Seamstress |
| Costume & Make-Up | Ellen Crawshaw | Costume Supervisor |
| Costume & Make-Up | Aimie Dauchez | Costume Assistant |
| Costume & Make-Up | Sarah Ferdinando | Seamstress |
| Costume & Make-Up | Anna Maria Genuise | Seamstress |
| Costume & Make-Up | Ruth Maclellan | Costume Coordinator |
| Costume & Make-Up | Callum Miller | Costumer |
| Costume & Make-Up | Elise Perry | Costume Assistant |
| Costume & Make-Up | Amy Rogers | Set Costumer |
| Costume & Make-Up | Kieron Stone | Costumer |
| Costume & Make-Up | Clara Tenfelde | Costume Assistant |
| Art | Amy Towle | Textile Artist |
| Costume & Make-Up | Elizabeth Wang | Seamstress |
| Costume & Make-Up | Anna Witcombe | Costume Standby |
| Editing | Joe Goode | First Assistant Editor |
| Editing | Daniel Rosenberg | Colorist |
| Production | Nuno Antoniotti | Unit Manager |
| Production | Omar Alboukharey | Location Manager |
| Production | Tom Barnes | Location Manager |
| Production | Lucy De Cort | Assistant Location Manager |
| Production | Louise Garner | Assistant Location Manager |
| Sound | Janet Grab | Music Editor |
| Crew | Ada Stachura | Assistant Script |
| Crew | Neal Beagley | Cast Driver |
| Crew | Craig Pedelty | Cast Driver |
| Production | Charlotte Ashby | Head of Production |
| Art | Rick Brophy | Standby Carpenter |
| Art | Matt Curtis | Title Designer |
| Production | Lizzie Debonnaire | Key Production Assistant |
| Production | Stephen Dixon | Production Consultant |
| Production | Matthew Evans | Production Assistant |
| Production | Natalie Garces-Bovett | Payroll Accountant |
| Production | Temi Adegbesan | Payroll Accountant |
| Production | Mia Garfield | Production Assistant |
| Production | Francesca Hughes | First Assistant Accountant |
| Crew | Saif Jones | Catering |
| Production | Debbie Kim | Production Executive |
| Production | Jessica Lester | Production Accountant |
| Production | Mandy Lo | Assistant Production Coordinator |
| Production | Tayyab Manan | Assistant Accountant |
| Production | Robin Marsh | Production Secretary |
| Production | Robin Marsh | Production Coordinator |
| Crew | Jessica Morris | Unit Publicist |
| Crew | Diana Scrivener | Choreographer |
| Production | Frances Stevens | Assistant Accountant |
| Production | Robbie Torbuck | Production Coordinator |
| Production | Amy Vearncombe | Assistant Production Coordinator |
